Orlando, FL -- The Florida sheriff's office that investigated Caylee Anthony's death says it overlooked a computer search for suffocation made from the little girl's home on the day she was last seen alive.

It's not known who performed the search. Orlando station WKMG reported the search was done on a browser primarily used by Casey Anthony.

Caylee's body was found six months after she disappeared.

Casey Anthony was acquitted of her daughter's murder in 2011. Her attorneys argued that the toddler accidentally drowned in the family pool and that Casey Anthony's father helped her cover it up.

We asked Winston-Salem Attorney, David Freedman of Crumpler, Freedman, Parker, and Witt if the new evidence would lead to a re-trial. He said, "There is nothing the state prosecutors office can do about that because the protections that all the defendants have in a criminal trial from double jeopardy. Once she's been found guilty once, that's it." Freedman said there may be one exception. "Unless they can find that she violated some federal law and try to prosecute her in federal court, which would be quite difficult."